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SECG 4.0 | User Manual
1
Introduction
1.1
Basic Concept
The WhaleTeq Single Channel ECG Test System 4.0 provides a single waveform to
one or more lead electrodes of diagnostic, ambulatory or monitoring ECGs, for testing
to IEC/YY/JJG particular standards. The following diagram shows the single channel
concept:
(Figure 1) Single channel concept
Via a SECG 4.0, the system produces arbitrary waveforms (streamed from the PC
with digital to analogue conversion) at up to ±5V, which is then applied to a precision
1000:1 divider to produce the voltages at up to ±5mV level (10mVpp).
The SECG 4.0 contains resistor/capacitor networks, dc offset, pacing circuit and relay
switching to provide the full range of single channel performance tests in IEC/YY/JJG
standards as described in Section 1.2.
The basic range of tests in the standards include, for example:
-
Sensitivity (accuracy of the mV/mm indication)
-
Frequency response (sine wave, and impulse tests)
-
Input impedance
-
Noise
-
Multichannel cross talk
-
Accuracy of heart rate indication
-
Pacemaker rejection
-
Tall T-wave rejection
For a full list of tests, refer to the standard together with Section 1.2.
The system does not provide:
-
CMRR tests (this requires a special noise free box, please reference CMRR
3.0+ on WhaleTeq website)
RA
LA
LL
RL
V1
V2
V3
V4
V5
V6
ECG device
under test
